Hearing aid, sound is an amplifier upgrade.Internal settings (tone, output, etc..), According to hearing loss is made by professionals. Hearing tests, according to the inner ear hearing aid can make settings to use is not correct. Therefore, testing should be done before the hearing loss and hearing aid should be selected for. / 14.04.2009

Hearing aid, sound
is an amplifier upgrade. Internal settings (tone, output,
etc..), According to hearing loss is made by
professionals. Hearing tests, according to the inner ear
hearing aid can make settings to use is not correct.
Therefore, testing should be done before the hearing
loss and hearing aid should be selected for.

Need to understand more than the opening of the audio
settings, such as hard, there can negatively affect the
hearing.

Each year, the test should be a re-hearing and hearing
aid if necessary change the settings of.
Hearing level is measured person, sound-proof room with
a private residence and the headphones are inserted.
Listen to the sound frequency in Hz
250-500-1000-2000-4000-8000 is pure tone. Each sound
level of the end of the frequency can be heard on the "threshold
of hearing" is. The hearing thresholds in the form of
points marked on a graph and the nearest point by
combining "odyogram" hearing, which is obtained from the
arc.
This is a measure of hearing through the air. The bone
behind the ear in a similar way to the bone vibrator was
placed way to measure the level of hearing.